JP2018170814A - Stator of rotary electric machine and rotary electric machine using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stator of a rotary electric machine which prevents displacement of insulation paper to improve insulation quality thereof.SOLUTION: A stator of a rotary electric machine and a rotary electric machine using the same comprise: a stator core having a plurality of slots; and stator coils constructed as a plurality of segment conductors provided at the slots. The plurality of segment conductors are received in the slots, where each slot has N segment conductors (N is a positive even number). The stator coils are constructed to be connected with the plurality of segment conductors through welds provided at respective conductor ends of the segment conductors. At a first axial coil end, the conductor ends are arranged annularly in a circumferential direction so as to form N annular lines. The stator core has: first laminated steel plates in which a direction in which the segment conductors are inserted into the respective slots is inverse to a punching direction; and second laminated steel plates in which a direction in which the segment conductors are inserted into the respective slots is identical to a punching direction. Respective burrs of the first laminated steel plates and the second laminated steel plates face each other.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a stator of a rotating electric machine and a rotating electric machine using the same.

  In response to the recent global warming, rotating electrical machines are required to have a small size and high output. As such a rotating electrical machine, for example, it has a stator core having a large number of slots that are open on the inner peripheral side, and a plurality of substantially U-shaped segment conductors are inserted into each slot to improve the space factor. In order to increase the output by improving the cooling performance, it is known.

  And the alternating current generator for vehicles which prevented the shift | offset | difference of insulation paper and the insulation breakdown by making the insertion direction to the slot of a substantially U-shaped segment conductor and the punching direction of the laminated steel plate of a stator core reverse. (For example, refer to Patent Document 1).

Japanese Patent No. 3478183

  Since the technique described in Patent Document 1 mainly targets an air-cooled and low-voltage (12 VDC) vehicle AC generator, the maximum current value is about 100 A or less, and a thin coil is sufficient.

  On the other hand, in a rotating electrical machine used for an electric vehicle or a hybrid electric vehicle, the maximum current is as large as 300A to 500A, and the coil is thick. When a thick segment conductor is bent into a corrugated shape after inserting the core, the insulating paper will be pushed in the anti-insertion direction. is there.

  In order to solve the above-mentioned problems, a stator of a rotating electrical machine and a rotating electrical machine using the same according to the present invention are configured by a stator core provided with a plurality of slots and a plurality of segment conductors provided in the slots. A plurality of segment conductors are accommodated in each slot, which is a positive even number, and the stator coils are provided at the conductor ends of the respective segment conductors. The plurality of segment conductors are connected via a welded portion, and the conductor end portions are annularly arranged in the circumferential direction at one coil end in the axial direction, forming an N-row annular row, The stator core includes a first laminated steel sheet in which the insertion direction of the segment conductor into the slot and the punching direction are opposite directions, and the insertion direction of the segment conductor into the slot and the punching direction are the same direction. And a certain second laminated steel, burrs and the second laminated steel plate and the first laminated steel plates are disposed back to back.

  ADVANTAGE OF THE INVENTION According to this invention, the stator of the rotary electric machine excellent in insulation can be provided.

  Problems, configurations, and effects other than those described above will become apparent from the description of the following examples.

It is sectional drawing which shows the rotary electric machine 10 provided with the stator 20 which concerns on this embodiment. It is a perspective view of the stator 20 concerning this embodiment. 4 is a conceptual diagram illustrating a winding method of a stator coil 60. FIG. FIG. 4 is a perspective view when the connection operation of FIG. 3 is repeated until a segment conductor 28 becomes annular, and a U-phase coil 40 for one phase (U phase as an example) is formed. FIG. 6 is a partially enlarged view of the vicinity of a conductor end portion 28E of the stator 20 of the rotating electrical machine 10. 3 is a partial perspective view of a coil end 61 on the side opposite to the weld of the stator 20. FIG. FIG. 3 is a cross-sectional view showing the insertion direction of a segment conductor 28 and the configuration in a slot 15 of a stator core 21 according to the present embodiment. It is sectional drawing which shows the structure in the slot 15 of the stator core 21 and the insertion direction of the segment conductor 28 which concerns on other embodiment (2nd Example). It is sectional drawing which shows the structure in the slot 15 of the stator core 21 and the insertion direction of the segment conductor 28 which concerns on other embodiment (3rd Example). It is sectional drawing which shows the structure in the slot 15 of the stator core 21 and the insertion direction of the segment conductor 28 which concerns on other embodiment (4th Example). It is sectional drawing which shows the structure in the slot 15 of the stator core 21 and the insertion direction of the segment conductor 28 which concerns on other embodiment (5th Example). It is a block diagram which shows the structure of the vehicle carrying the rotary electric machine by this embodiment.

Embodiments of the present invention will be described below with reference to the drawings.
In the following description, an electric motor used in a hybrid vehicle is used as an example of a rotating electric machine. In the following description, “axial direction” refers to a direction along the rotation axis of the rotating electrical machine. The circumferential direction refers to the direction along the rotational direction of the rotating electrical machine. The “radial direction” refers to a radial direction (radial direction) when the rotational axis of the rotating electrical machine is the center. “Inner circumference side” refers to the radially inner side (inner diameter side), and “outer circumference side” refers to the opposite direction, that is, the radially outer side (outer diameter side).

  FIG. 1 is a cross-sectional view showing a rotating electrical machine 10 including a stator 20 according to this embodiment. The rotating electrical machine 10 includes a housing 50, a stator 20, a stator core 21, a stator coil 60, and a rotor 11.

  The stator 20 is fixed to the inner peripheral side of the housing 50. The rotor 11 is rotatably supported on the inner peripheral side of the stator 20. The housing 50 constitutes the outer casing of the rotating electrical machine 10 formed into a cylindrical shape by cutting an iron-based material such as carbon steel, casting of cast steel or aluminum alloy, or pressing. The housing 50 is also referred to as a frame or a frame.

  A liquid cooling jacket 130 is fixed to the outer peripheral side of the housing 50. The inner peripheral wall of the liquid cooling jacket 130 and the outer peripheral wall of the housing 50 constitute a refrigerant passage 153 for a liquid refrigerant RF such as oil, and the refrigerant passage 153 is formed so as not to leak. The liquid cooling jacket 130 houses a bearing 144 and a bearing 145, and is also referred to as a bearing bracket.

  In the case of direct liquid cooling, the refrigerant RF passes through the refrigerant passage 153 and flows out from the refrigerant outlet 154 and the refrigerant outlet 155 toward the stator 20 to cool the stator 20.

  The stator 20 includes a stator core 21 and a stator coil 60. The stator core 21 is made by laminating thin sheets of silicon steel plates. The stator coil 60 is wound around a plurality of slots 15 provided in the inner peripheral portion of the stator core 21. Heat generated from the stator coil 60 is transferred to the liquid cooling jacket 130 via the stator core 21 and is radiated by the refrigerant RF flowing through the liquid cooling jacket 130.

  The rotor 11 includes a rotor iron core 12 and a rotating shaft 13. The rotor core 12 is made by laminating thin sheets of silicon steel plates. The rotating shaft 13 is fixed to the center of the rotor core 12. The rotary shaft 13 is rotatably held by a bearing 144 and a bearing 145 attached to the liquid cooling jacket 130, and rotates at a predetermined position in the stator 20 at a position facing the stator 20. The rotor 11 is provided with a permanent magnet 18 and an end ring (not shown).

  In assembling the rotating electrical machine 10, the stator 20 is inserted into the housing 50 in advance and attached to the inner peripheral wall of the housing 50, and then the rotor 11 is inserted into the stator 20. Next, the rotating shaft 13 is assembled to the liquid cooling jacket 130 so that the bearings 144 and 145 are fitted.

  A detailed configuration of the main part of the stator 20 used in the rotating electrical machine 10 according to the present embodiment will be described with reference to FIGS. FIG. 2 is a perspective view of the stator 20 according to the present embodiment. FIG. 3 is a conceptual diagram illustrating a winding method of the stator coil 60. FIG. 4 is a perspective view when the U-phase coil 40 for one phase (for example, U phase) is formed by repeating the connection operation of FIG. 3 until the segment conductor 28 becomes annular.

  As shown in FIG. 2, the stator 20 includes a stator core 21, a stator coil 60 wound around a plurality of slots 15 provided in the circumferential direction on the inner peripheral portion of the stator core 21, and It is composed of The stator coil 60 uses a conductor having a substantially rectangular cross section, improves the space factor in the slot, and improves the efficiency of the rotating electrical machine 10. The stator coil 60 according to the present embodiment is made of a copper wire.

  In the stator core 21, for example, 72 slots 15 forming the opening 21S are formed on the inner diameter side in the circumferential direction. A slot liner 302 is disposed in each slot 15 to electrically insulate the stator core 21 and the stator coil 60 from each other.

  The slot liner 302 has a B-shaped or S-shaped cross section so as to wrap the stator coil 60.

  As shown in the upper diagram of FIG. 3, the stator coil 60 includes a plurality of segment conductors 28 that are insulated by enamel or the like having a substantially rectangular cross section. The segment conductor 28 is molded so as to have a substantially U shape such that the anti-welding side coil end apex 28 </ b> C is a turning point. At this time, the non-welding side coil end apex 28 </ b> C may be any shape that wraps around the conductor in a substantially U shape. That is, as shown in the upper diagram of FIG. 3, the shape is not limited to a shape in which the anti-welding side coil end apex 28 </ b> C and the conductor skew portion 28 </ b> F form a substantially triangular shape when viewed from the radial direction. For example, in a part of the anti-welding side coil end apex 28C, the segment conductor 28 is substantially parallel to the end surface of the stator core 21 (when viewed from the radial direction, the anti-welding side coil end apex 28C and the conductor are skewed. The portion 28F may have a substantially trapezoidal shape).

  As shown in the central view of FIG. 3, the segment conductor 28 is inserted into the slot 15 from the axial direction. Another segment conductor 28 inserted at a distance of a predetermined number of slots is connected to the conductor end 28E. The segment conductors 28 are connected by welding, for example.

  At this time, the segment conductor 28 has a conductor straight line portion 28S that is a portion inserted into the slot 15 and a conductor skew portion 28D that is a portion inclined toward the conductor end portion 28E of the segment conductor 28 to be connected. It is formed. In the present embodiment, the conductor skew portion 28D and the conductor end portion 28E are formed by bending.

  As shown in the lower part of FIG. 3, 2, 4, 6... (Multiple of 2) segment conductors 28 are inserted into the slot 15. In this example, four segment conductors D1 to D4 are inserted into one slot 15. However, since the cross section is a substantially rectangular conductor, the space factor in the slot 15 can be improved, and the efficiency of the rotating electrical machine 10 can be improved. Will improve. Segment conductors D1 to D4 are arranged on the layers 28R1 to 28R4, respectively.

  As shown in FIG. 4, the U-phase coil 40 for one phase is configured such that the conductor end 28 </ b> E gathers on one side in the axial direction. The U-phase coil 40 forms a welding side coil end 62 where the conductor end 28E gathers, and an anti-welding side coil end 61 opposite to the conductor end 28E. The U-phase coil 40 has a U-phase terminal 42U at one end and a neutral wire 41 at the other end. The same applies to the V-phase coil and the W-phase coil.

  The detailed configuration of the welded portion (welding side coil end 62) of the stator 20 used in the rotating electrical machine 10 will be described with reference to FIG. FIG. 5 is a partially enlarged view of the vicinity of the conductor end 28 </ b> E of the stator 20 of the rotating electrical machine 10.

  Insulating paper 300 is arranged in an annular shape for insulation between the segment conductors 28. Insulating paper 301 is annularly arranged in order to insulate the welded portion formed on the conductor end portion 28E.

  After the insulating paper 300 and the insulating paper 301 are disposed, the whole of the plurality of segment conductors 28 is covered with a resin member to enhance insulation. Alternatively, the first resin member (for example, polyester or epoxy liquid varnish) is dropped on the whole or a part of the plurality of segment conductors 28 and cured. In order to reinforce the insulation of the welded portion, the vicinity of the welded portion may be covered with a second resin member (for example, an epoxy-based powder varnish).

  The detailed configuration of the anti-welding side coil end 61 of the stator 20 will be described with reference to FIG. FIG. 6 is a partial perspective view of the coil end 61 on the anti-welding side of the stator 20. Insulating paper 301 is annularly arranged for insulation between the segment conductors 28.

  FIG. 7 is a cross-sectional view showing the insertion direction of the segment conductor 28 and the configuration in the slot 15 of the stator core 21 according to the present embodiment.

  The stator core 21 includes a laminated steel plate 21A in which the coil insertion direction 70 and the punching direction 71 of the laminated steel plate are opposite to each other, and a laminated steel plate 21B in which the coil insertion direction 70 and the punching direction 72 of the laminated steel plate are opposite to each other. Each of the laminated steel plates 21A and 21B is arranged so that the burrs are pointed back to back. That is, the lowermost layer burr of the laminated steel plate 21A and the uppermost layer burr of the laminated steel plate 21B are arranged so as not to be crushed.

  According to this configuration, when the segment conductor 28 is inserted into the slot 15, the coil insertion direction 70 and the punching direction 71 (burr direction) of the laminated steel sheet 21 </ b> A are reversed, so that the insulating paper 302 is prevented from shifting. .

  Further, after the segment conductor 28 is inserted, the segment conductor 28 is bent in a direction opposite to the coil insertion direction 70 (for example, the punching direction 71) when the segment conductor 28 is bent to form the conductor skew portion 28D and the conductor end portion 28E. There is a possibility that the insulating paper 302 is displaced. However, by disposing the laminated steel plate 21B in which the coil insertion direction 70 and the punching direction 72 of the laminated steel plate are in the same direction, it is possible to prevent the insulating paper 302 from shifting. This is an example in which the laminated steel 21A and laminated steel 21B shown in FIG. In addition, the case where the laminated steel plate 21B has a larger thickness than the laminated steel plate 21A is included within the range of the plate thickness tolerance and the manufacturing tolerance.

  FIG. 8 is a cross-sectional view showing the insertion direction of the segment conductor 28 and the configuration in the slot 15 of the stator core 21 according to another embodiment (second example).

  As in the embodiment shown in FIG. 7, the stator core 21 according to the second example includes a laminated steel plate 21 </ b> A in which the coil insertion direction 70 and the punching direction 71 of the laminated steel plate are opposite to each other, and the laminated steel plate 21. The punching direction 72 is composed of laminated steel plates 21B in the same direction, and each laminated steel plate 21A and laminated steel plate 21B are arranged with burrs pointed back to back (that is, not crushed).

  Here, it is difficult to determine which is higher whether the insulating paper 302 is displaced when the segment conductor 28 is inserted or the possibility that the insulating paper 302 is displaced when the segment conductor 28 is bent. It is clear that the displacement amount by which the insulating paper 302 is displaced when the conductor 28 is inserted is larger. Therefore, it is desirable that the laminated steel sheet 21A with the coil insertion direction 70 and the laminated steel sheet punching direction 71 opposite in direction is larger than the laminated steel sheet 21B in the same direction.

  The core product of laminated steel sheets is usually stacked. In other words, after stacking several laminated steel sheets, the objective is to improve the core thickness deviation due to the thickness deviation in the roll direction of the steel sheet by performing a next stacking operation by rotating a predetermined angle.

  As shown in FIG. 8, in the case of the three-stage product of the laminated steel sheet 21A, the laminated steel sheet 21A, and the laminated steel sheet 21B, the laminated steel sheet 21A with the reverse direction from the coil insertion direction 70 to the second stage is the same direction as the third stage. It is comprised with the laminated steel plate 21B.

  According to this configuration, it is possible to increase the effect of preventing the shift of the insulating paper when the segment conductor 28 is inserted while preventing the insulating paper 302 from shifting when the segment conductor 28 is bent. The ratio of the stacked steel sheets 21A and 21B is 2: 1, but includes the case of deviation from the ratio of 2: 1 within the range of thickness tolerance and manufacturing tolerance.

  FIG. 9 is a cross-sectional view showing the insertion direction of the segment conductor 28 and the configuration in the slot 15 of the stator core 21 according to another embodiment (third example).

  This is an embodiment of a four-stage product, compared to the example of the three-stage product in FIG. The laminated steel plate 21A has a reverse direction from the coil insertion direction 70 to the third stage, and the fourth stage is constituted by a laminated steel sheet 21B in the same direction. According to this configuration, the insulating paper 302 is prevented from shifting when the segment conductor 28 is bent, and the effect of preventing the insulating paper 302 from shifting when the segment conductor 28 is inserted is greater than that of the first and second embodiments. it can. The ratio of the thicknesses of the laminated steel sheets 21A and 21B is 3: 1, but includes the case where the thickness is deviated from the ratio of 3: 1 within the range of the thickness tolerance and the manufacturing tolerance.

  Here, the required number of the laminated steel plates 21B varies depending on the motor output, the stator size, the thickness of the coil, the bending angle, and the like, but the minimum number is one to two. It is important that burrs protrude outside the stacked portion on the side opposite to the insertion side. When the coil is bent on the burrs, the insulating paper 302 is pushed and hooked, so that the insulating paper 302 can be prevented from shifting. Further, the present embodiment includes adding a role of fixing a laminated steel plate such as V-caulking to the laminated steel plate 21A or the laminated steel plate 21B.

  FIG. 10 is a cross-sectional view showing the insertion direction of the segment conductor 28 and the configuration in the slot 15 of the stator core 21 according to another embodiment (fourth example). A laminated steel plate 21C is provided in which the coil insertion direction 70 and the punching direction 71 of the laminated steel plate are formed in opposite directions. The laminated steel plate 21 </ b> C has V caulking 22 formed thereon. On the other hand, a laminated steel plate 21D that forms a coil insertion direction 70 and a punching direction 72 of the laminated steel plate is provided, and this laminated steel plate 21D forms a hole 23 for preventing the protrusion of the V caulking 22 from protruding in the partial axial direction. . And this laminated steel plate 21C and laminated steel plate 21D are arranged so that the burrs are pointed back to back (so as not to be crushed).

  FIG. 11 is a cross-sectional view showing the insertion direction of the segment conductor 28 and the configuration in the slot 15 of the stator core 21 according to another embodiment (fifth example).

  9 is the same four-tiered embodiment as FIG. 9, but the first stage from the coil insertion direction 70 is the laminated steel sheet 21A in the reverse direction, the second stage is the laminated steel sheet 21B in the same direction, and the third stage is the laminated steel sheet in the reverse direction. 21A and the 4th stage are comprised by the laminated steel plate 21B of the same direction. The ratio of the laminated steel plate 21A and the laminated steel plate 21B of this configuration is the same as that of the first embodiment, and substantially the same effect as that of the first embodiment is obtained. This is a modification of the first embodiment.

  In any of the above-described embodiments, the burrs are arranged on the axial end surface of the stator core 12 so as to face the outside in the axial direction (direction outside the stator core). That is, at the axial end surface of the stator core 12, the burrs are arranged so as to protrude outward in the axial direction. Moreover, in Example 4 demonstrated using FIG. 10, the laminated steel plate 21D in which the hole 23 is arrange | positioned is arrange | positioned at an axial direction end surface, and the jumping out to the axial direction of V caulking 22 is prevented.

  With this configuration, it is possible to prevent the insulating paper 302 from being displaced when the segment conductor 28 is inserted while preventing the insulating paper 302 from shifting when the segment conductor 28 is bent. Even when a thick segment conductor required for an electric vehicle or a hybrid electric vehicle is bent into a corrugated shape after inserting a core, it is possible to obtain a rotating electric machine that can prevent not only the insertion direction in which the coil is inserted but also the insulation paper in the anti-insertion direction. It will be a thing.

  In the above description, a permanent magnet type rotating electrical machine has been described. However, since the feature of the present invention relates to the coil winding of the stator, the rotor is not a permanent magnet type, but an induction type or synchronous reluctance. It can also be applied to a claw magnetic pole type. In addition, the winding method is a wave winding method, but any winding method having similar characteristics can be applied. Next, the explanation is made with the inner rotation type, but the same applies to the outer rotation type.

  The configuration of the vehicle on which the rotating electrical machine 10 according to this embodiment is mounted will be described with reference to FIG. FIG. 12 is a powertrain of a hybrid vehicle on the premise of four-wheel drive. An engine and a rotating electrical machine 10 are provided as main power on the front wheel side. The power generated by the engine and the rotating electrical machine 10 is shifted by the transmission and transmitted to the front wheel drive wheels. In driving the rear wheel, the rotating electrical machine 10 disposed on the rear wheel side and the rear wheel side driving wheel are mechanically connected to transmit power.

  The rotating electrical machine 10 starts the engine and switches between generation of driving force and generation of electric power for recovering energy at the time of vehicle deceleration as electric energy according to the running state of the vehicle. The driving and power generation operation of the rotating electrical machine 10 are controlled by the power converter so that the torque and the rotational speed are optimized in accordance with the driving situation of the vehicle. Electric power necessary for driving the rotating electrical machine 10 is supplied from the battery via the power converter. Further, when the rotating electrical machine 10 is in a power generation operation, the battery is charged with electrical energy via the power conversion device.

  Here, the rotating electrical machine 10 that is the power source on the front wheel side is disposed between the engine and the transmission, and has the configuration described with reference to FIGS. As the rotating electrical machine 10 that is a driving force source on the rear wheel side, the same one can be used, or a rotating electrical machine having another general configuration can be used. Of course, the present invention can also be applied to a hybrid system other than the four-wheel drive system.

  As described above, according to the present invention, it is possible to provide a stator for a rotating electrical machine that is excellent in insulation, in which the insulation paper is prevented from being displaced despite the small size and the high output.

  In addition, this invention is not limited to an above-described Example, Various modifications are included. For example, the above-described embodiments have been described in detail for easy understanding of the present invention, and are not necessarily limited to those having all the configurations described. In addition, it is possible to add, delete, and replace other configurations for a part of the configuration of the embodiment.

DESCRIPTION OF SYMBOLS 10 ... Rotary electric machine, 11 ... Rotor, 12 ... Rotor core, 13 ... Rotary shaft, 15 ... Slot, 18 ... Permanent magnet, 20 ... Stator, 21 ... Stator iron core, 21A ... Laminated steel plate, 21B ... Laminated steel plate , 21C ... laminated steel sheet, 21D ... laminated steel sheet, 21S ... opening, 22 ... V crimping, 23 ... V crimping hole, 28 ... segment conductor, 28C ... anti-welding side coil end apex, 28D ... conductor skew part, 28E ... Conductor end, 28F ... Conductor skew section, 28S ... Conductor straight section, 40 ... U phase coil, 41 ... Neutral wire, 42U ... Terminal, 50 ... Housing, 60 ... Stator coil, 61 ... Coil end on the non-weld side , 62 ... welding side coil end, 70 ... coil insertion direction, 71 ... punching direction, 72 ... punching direction, 130 ... liquid cooling jacket, 144 ... bearing, 145 ... bearing, 153 ... refrigerant passage, 154 ... Medium outlet, 155 ... refrigerant outlet, 300: insulating paper, 301: insulating paper, 302 ... slot liners, RF ... refrigerant

Claims (7)

A stator core provided with a plurality of slots;
A stator coil constituted by a plurality of segment conductors provided in the slot,
The plurality of segment conductors are accommodated in each slot, which is a positive even number,
The stator coil is configured by connecting a plurality of the segment conductors via welds provided at the conductor end portions of the segment conductors,
The conductor end portions are annularly arranged in the circumferential direction at one coil end in the axial direction, and constitute an N-row annular row,
The stator core includes a first laminated steel sheet in which the insertion direction of the segment conductor into the slot and the punching direction are opposite directions, and a second direction in which the insertion direction of the segment conductor into the slot and the punching direction are the same direction. Having laminated steel sheets,
The stator of the rotary electric machine by which the burr | flash of the said 1st laminated steel plate and the said 2nd laminated steel plate is arrange | positioned back-to-back. The stator of the rotating electrical machine according to claim 1,
A stator for a rotating electrical machine in which the first laminated steel sheet has a larger or larger stacking thickness than the second laminated steel sheet. The stator of the rotating electrical machine according to claim 1,
A stator of a rotating electrical machine in which a stack thickness of the first laminated steel plate and a stack thickness of the second laminated steel plate are substantially equal. The stator of the rotating electrical machine according to claim 1,
A stator of a rotating electrical machine in which a ratio of a stacked thickness of the first laminated steel plate to a stacked thickness of the second laminated steel plate is approximately 2: 1. The stator of the rotating electrical machine according to claim 1,
A stator of a rotating electrical machine in which a ratio of a stacked thickness of the first laminated steel plate and a stacked thickness of the second laminated steel plate is approximately 3: 1. In the stator of the rotating electric machine according to any one of claims 1 to 5,
The first laminated steel sheet has a V-caulking projection,
A stator of a rotating electrical machine in which at least one of the plurality of second laminated steel plates forms a hole for accommodating the protruding portion of the V-caulking.   A rotary electric machine comprising the stator of the rotary electric machine according to any one of claims 1 to 6.

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